gentoo-overlay/games-board/pysolfc/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>games</herd>
  <use>
    <flag name="extra-cardsets">Install extra cardsets</flag>
	<flag name="sound">Enable sound support using <pkg>dev-python/pygame</pkg></flag>
  </use>
</pkgmetadata>